This is a cool idea.
Needed 2-3 rounds first until i fully got what to do, but then it's pretty fun. Maybe a little explanation at the beginning or in the description could help?
Think maybe it needs a bit more balancing, because in the end i only had one member left and pressed numbers randomly until the endboss was dead :-D
Definitely can see the "strength in numbers" here amd looking forward to your post-jam bosses, all in all a pretty fun game with nice graphics.